This portable PC has an HDD storage medium, which is the most commonly found storage medium on medium processor core laptops that are a comparable age to it. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.
It may also be worth considering one of the other portable PCs that have an HDD storage media currently available including because of it's better review score, the DELL Vostro 15, the HP ProBook 650, or the MSI PE70 2QE.
If you would prefer a portable PC with a better storage medium then you might want to look at the Latitude 15 3550 (Hybrid-HDD and higher rated), the Latitude 14 7000 (Hybrid-HDD and higher rated), or the Latitude E6540 (Hybrid-HDD and higher rated) all from DELL.